@book{Kopp1985,
author="Horst Kopp",
title="Land usage and its implications for Yemeni agriculture",
year="1985",
booktitle="Economy, Society and Culture in Contemporary Yemen",
editor="B.R. Pridham",
publisher="Croom Helm",
address="London",
pages="41-50",
keyword0="Agriculture",
keyword1="Migration",
type="chapter"
}